/Engine/Plugins/Experimental/Mutable/Source/MutableRuntime/Public/MuR/Instance.h
Get a mesh resource id from a component
an ummodifiable pointer to the requested mesh. The returned object is guaranteed to be alive only while this instance is alive. The ownership of the returned object remains in the instance, so it should not be deleted.
FResourceID GetMeshId ( int32 lod, int32 comp, int32 mesh ) const